Hello, point and shoot telephoto lenses with dust on the interior glass lenses--the dust makes dark spots that increase as the lens zoom is increased--how does one clean this dust from the interior lense? light tapping will move some of the dust, but once it is on the interior lenses, it is impossible to get this off--is disassembly easy? special tools required?
Basic lens cleaning tools are a blower, a microfiber cloth, and lens cleaning fluid (my favorite: Zeiss). Try to blast dust off the lens with the blower or canned air. Finger prints can be removed with a circular wipe of the new miracle micro fiber cloth (my favorite brand is Pentax because it is nice and thick; about $6). Persistent dirt should be removed with lens cleaning fluid, of which the safest is probably Kodak. Always drip the fluid onto the cloth and then wipe the lens; never put fluid directly onto a lens.